chondrotissue®
is a combination of a resorbable polyglycolic acid felt
(scaffold), product of two CE certified class III medical
devices. The medical device Soft PGA Felt®, from the
company alphaResearch Switzerland GmbH, is impregnated
with hyaluronic acid and the medical device Ostenil®,
from the company TRB Chemedica AG, and subsequently freeze-dried.
Through the impregnation and freeze-drying processes,
an addition product is obtained as a mixture of the two
medical devices. A new medical device is formed, but no
new material compound.
The characteristic property of the polyglycolic acid felt
in chondrotissue® is a separable
mixture of the starting materials polyglycolic acid felt
(Soft PGA Felt®) and hyaluronic acid (OSTENIL®).
The characteristic property of Soft PGA Felt is its strength
that ensures initial mechanical stability. The maximum
tensile force required to tear Soft PGA Felt and chondrotissue®
is identical. The characteristic property of hyaluronic
acid is its viscoelasticity. Hyaluronic acid can be separated
from the felt following impregnation of chondrotissue®
in liquids by centrifuging. The viscosity of the starting
material OSTENIL® is identical to the viscosity of
hyaluronic acid in chondrotissue®.
The visco-elasticity of the hyaluronic acid in chondrotissue®
can be restored by immersing chondrotissue®
in autologous serum derived from the patient to be treated.
